package com.dc.designPattern._9_facade.impl;

/**
 * Description: 投影仪
 * @author: gdc
 * @date: 2021/3/16
 * @version 1.0
 */
public class Projector {

    private static Projector INSTANCE = new Projector();

    public static Projector getInstance(){
        return INSTANCE;
    }

    public void on() {
        System.out.println(" 投影仪 打开 ");
    }

    public void off() {
        System.out.println(" 投影仪 关闭 ");
    }

    public void focus() {
        System.out.println(" 投影仪 正在 投影  ");
    }

}
